itch.io

Hi Iven,

Thank you for the kind words! We have been keeping the price for PixelCNC a bit on the low side since July and I don't imagine we'll lower it further any time soon (maybe during the holidays toward the end of the year?)

Yes, there is a hard limit on the number of vertices that can be generated, I believe it's 8 million right now. We might just bump it up to a ridiculously large value but that will cause "out of memory" errors on some systems that don't have a lot of memory, and our goal is to keep PixelCNC running on hardware for as long as possible without someone needing to buy a whole new computer just to use and run our software. We had perfectly find CAD/CAM software that ran perfectly fine on hardware of 20 years ago, which was at least an order of magnitude less capable than hardware today, so there's no excuse for software today not being blazingly fast on today's computers. It just means developers don't know what they're doing!

The complexity of a project's canvas will also increase the potential for creating cutpath vertices. If there is a lot of variance it will create more vertices compared to a flat/smooth canvas. You can try increasing the Toolpath Simplify and Min/Max segment length settings in CNC/CAM Settings, under the Config menu. I tend to refrain from changing the Min Segment Length setting though, and instead decrease the canvas resolution for a uniform reduction in vertices across the board - but you might be able to get away with changing Min Length to something like 0.05mm->0.1mm while keeping the canvas resolution high. I would start with raising the Max Length setting to something like 10mm, and maybe even beyond that. That will reduce vertices in planar areas that the simplify pass results in, but the thing to watch out for with increasing the Max Length setting is that where the toolpath changes direction (i.e. traveling flat to traveling up, or vice-versa) the toolpaths can end up placing vertices that are a bit wonky at the direction change there, usually along the bottom edge of shapes in a relief. For smaller stepovers it's not as much of a problem during cutting though.

Hope that helps! Let me know if you have any other questions or need help with anything else :)

 - Charlie

Hi Joe,

The tool library is stored inside the config file - but you can run PixelCNC on whatever system that has it and then go File->Export Tool Library to output it to a file that you can move between systems. Then you run PixelCNC on the system you want to use the tool library on and go File->Import Tool Library, which will copy the tool library into that system's PixelCNC config. The import/export tool library functionality is just for externally backing up or transferring tool libraries between systems, it's not something that PixelCNC will continue to reference for tool definitions.

Thanks for the question. Hope that helps!

 - Charlie

Hi Joe,

So far most of the pending changes are bugfixes - the list of reported bugs keeps growing and some features are half-baked at the moment. I will probably at least clean everything up enough to put out a new update soon.

Thanks again, have a good week!

 - Charlie

Hi Joe,

Not yet! There have been a lot of new things keeping me busy this past year but PixelCNC is still being supported for the foreseeable future.

Have a good weekend! :]

 - Charlie

Ah, yes, exported G-code defaults to inches. You can change the "G20" in exported G-code to "G21" and then coordinates will be treated as metric. So if you want to make a 100mm hologram just set cnc_scaling to 100 and edit exported G-code to have G21 instead of G20 and it should work. The recommended workflow is to export your hologram optics as an SVG and import that into a CAM program that can generate G-code from the vector paths. That will give you more control over generated G-code than Holocraft does because the G-code export functionality is extremely minimal. Cheers! :]

Where is "cnc_scaling"?

Hi NicoClock,

When you say you want a toolpath that gradually mills are you referring to a slope at the bottom of the triangle pocket?

If that is the case you can tilt a blank raster-layer to get a slope, or create a swept shape using the Path Sweep function in the paths-editing mode to sweep a path drawn as a ramp with the desired depths at each end. Then with your triangle path you can use the Shapes From Paths function with the Shape Exterior option enabled to create a raster-layer with the triangle as a pocket. Then your operations would toolpath off of that canvas composition.

Let me know if that will work for you or if you need more detailed information about anything :]

 - Charlie

Hi QRUXEL,

The honest truth is that PixelCNC's heightmap based setup is just not ideal for large projects, because it entails processing huge heightmaps for anything that needs high resolution.

The canvas resolution is going to be the absolute resolution that canvas compositing and any kind of shape generation happens at. It is also the resolution that cutpaths are generated from the canvas at. That's not to say that cutpath coordinates are limited to that resolution, but instead that the shape/dimension of things contoured will be limited to that resolution.

The model supersampling factor is how many effective pixels that a 3D model is rendered at, relative to the canvas resolution, when PixelCNC is internally generating a heightmap from a model-layer. So if your canvas resolution is 200ppi and your model supersampling is set to 9x, then model-layers will be rendered at 600ppi (i.e. 3x3 model rasterization pixels per canvas pixel). The model supersampling is there for antialiasing purposes, so that model geometry doesn't result in jagged aliased edges when compositing with the canvas (for toolpathing or any other contouring-related functions). If accuracy and dimension of features is important then I would crank up the model super sampling as high as it will go.

So PixelCNC is currently 100k lines of code, not counting whitespace lines or comments. It was originally much simpler and my ideas for a v2.0 that was meant to be written from scratch ended up just getting somewhat shoehorned into the original v1.0 codebase. It's a lot of bespoke code that there is not going to be anything any LLM would've gleaned from the web about, as opposed to a project that more so just glues a bunch of libraries together through their various APIs. I don't have the time to sit down and start trying to hold an LLM's hand trying to see if it will ever understand PixelCNC's code base enough to be able to do anything worthwhile with it. For boilerplate I'm hearing the LLMs are great, but I am highly doubtful that they'll be able to do much with a 100k line codebase written in C that facilitates extricating all of the issues that are basically a part of its DNA, only because those decisions were made very early on at the outset.

I appreciate the suggestion but at the end of the day PixelCNC just needs a complete and total re-write from scratch that actually accounts for things like localization, keyboard layouts, etc. It is the way that it is for the foreseeable future, unless someone wants to come along and start paying me a livable income to develop it into a more solid product. Nowadays I am earning most of my income from making custom signs for clients and just don't spend much time at all sitting at the computer like I could back in the heyday of PixelCNC's development. I'd love to get back into coding again but it just doesn't pay the bills. :P

Thanks again, and let me know if you have any other questions or need help with anything. Have a good rest of your weekend! :]

 - Charlie

Hi Ludvig,

Unfortunately at this time there isn't a way to interrupt the toolpath generation. One idea is to temporarily keep your canvas resolution somewhat lower while you are creating your operations, then increase the canvas resolution to where it's needed and re-generate your toolpaths after all of their parameters have been figured out. This way if you make a mistake with your toolpath parameters it will not take a long to generate the toolpath, being at a lower canvas resolution. The toolpath generation is spun off on a background thread and what we will need to do in order to allow aborting toolpath generation is to go through each toolpath generation function and sprinkled abort checks throughout to determine if the function needs to stop what it's doing and then cleanup everything that has been allocated up to that point before bailing out. It's not too much of an undertaking but there are other things that currently have higher priority that are being worked on. The todo list is ever-growing and very long!

It's a known issue that the keyboard input is hard-coded for American QWERTY keyboard layouts, this is something that will require a substantial rework of the entire user input system. The input system was largely borrowed from an old game engine project that was written 15+ years ago, and that only needed minimal user interface functionality. The way PixelCNC stands right now it's more likely that the entire program will just be re-written from scratch to fix that issue, and a few other issues that are "deep" in the code. PixelCNC was originally a personal project intended for personal use that wasn't meant to see the light of day, so some of the early decisions made in its development did not take things into account like the possibility of someone else with a different keyboard layout using it, or any kind of localization capability.

Thank you for your questions and words of praise! Let me know if you have any other questions or need help with anything else :]

 - Charlie

No problem! Let me know how she goes :]

 - Charlie

Hi Dave,

In both cases it's important to keep in mind that an endmill is not going to be able to produce sharp inside corners (i.e. the 90 degree corners in a square pocket, or the sharp angled points on a 5-point star shaped pocket). They'll only be able to have a radius as small as half of the diameter of the endmill used to mill the pocket out. That being said, the best ways to go for 2D milling an area are with either the 2D Trochoidal Milling operation or the 2D Offset Milling operation, at least for general roughing. Then come in afterward with a 2D Profile Milling operation to bring the carved area to size and shape as much as is possible with the endmill being used. You'll want to include an Offset on your roughing operations to leave something for profiling to cleanup. Keep in mind that the profile milling operation puts the center of the cutter on the edge of the contour being cut, which means you'll need to include half of the cutter's diameter as an Offset to have the tool follow the inside of the contour (but the 2D Trochoidal/Offset Milling operations automatically keep cutpaths inside of the contour being milled out with Offset being zero).

The 2D Trochoidal/Offset Milling operations both allow you to choose between tracing one of the canvas layer groups at a specified Z plane or using a paths-layer as contour input from which cutpaths are generated. This means that you can either just have it generate a toolpath directly from the canvas for 2D milling, or feed it your own paths-layer, either hand-drawn, traced from something else (like an image or 3D model that was traced to paths) or traced from a canvas composition of multiple raster/model/text layers.

For something like relief carvings you'll generally want to use the 2.5D variants of the offset/trochoidal milling operations, because it will contour the canvas at each successive cutting plane to generate cutpaths for, better conforming to the canvas as a whole for something like rough material removal before coming in with a 3D Contouring operation type like Parallel Carving.

Both of the 2D Milling operations mentioned include an Invert option on their input contour parameters that allows you to switch between cutting inside of a contour and outside of a contour, so if you just have text on the canvas that you want to mill out the inside of then you'll enable this option, assuming your canvas is at the default with zero Z-Fill and a default text-layer on there, like this:

With the Invert option disabled, contouring the canvas with just a text-layer as shown will mill out the outside of the text:

If you're completely new to everything there are going to be a lot of CNC/CAM things to learn that aren't specific to PixelCNC, such as what cut depths and stepovers and what feed rates and spindle speeds to use for different cutters and materials. There are some general rules of thumb, and they vary depending on what machine you're using and what its capabilities actually are. If your machine is rigid enough you can get away with using trochoidal (or sometimes called 'adaptive') toolpaths with a large depth of cut and a smaller cut stepover, at higher feed rates, allowing more of the cutter's flute length to be employed in material removal. Flimsier less rigid machines will only be able to handle small cut depths, but generally allow for a larger cut stepover, but this means that you'll be doing most of the material removal using just the tip of your cutter - wearing it out faster.

You'll want to become familiar with your machine - how to zero out the machine's coordinate system (i.e. set the machine origin) and jog it around, how best to hold down material without your work holding getting in the way when the machine is rapiding between cutpaths, or being in the way of any dust collection, etcetera.

If you have anything specific you'd like to do you can always send an email to support@deftware.org and I can give you more detailed help there.

Hope this helps! Apologies for the New Year's delay in replying, response times are generally within a few hours during non-holiday times. Cheers! :]

 - Charlie

Hi Patrick,

With tapered ballnose cutters their geometry tends to be the root cause of the issue. It's basically just physically impossible for a tapered ballnose to create a perfect edge due to the radius of the ballnose causing the piece to have a skirt that flares out at the bottom. The only resolution is what you've opted for, which is to come in with a different cutter and remove all of the material after the relief portion is carved. Typically I'll use a 1/8" endmill to mill out a relief, using the 2D Profile Milling operation. This can still result in a sort of discontinuity between the relief and the edges due to the cutters having different geometry. Typically the tapered cutter will have a smaller radius than the endmill and so is able to fit into smaller areas that the endmill cannot.

It looks like you managed pretty well on your own with your attempt! Sometimes finessing the actual geometry being carved can help as well, such as smoothing out the geometry on the edges so that the endmill that's tasked with carving the piece out can reach all of the same areas as the tapered cutter. Sometimes you can get away with using the tapered cutter to cut out a piece, but this can also result in discontinuities at times if the geometry being carved out doesn't entail the tapered cutter reaching all the way down around the piece where a profiling cutpath would traverse. It's a little difficult to explain but the result is that a profiling operation puts the cutter places that it didn't or doesn't go when relief carving, because profiling follows a contour extracted from a single Z plane whereas relief carving follows the geometry at all points. Hopefully that makes sense.

It really just takes some finesse on a case-by-case basis depending on what's being cut and what cutters are being used.

Let me know if you have any other questions or need help with anything else. Cheers! :]

 - Charlie

Hi Dave,

If you can show me a specific example of what you'd like to know how to do I'd love to walk you through it :]

Thanks for your interest in PixelCNC and have a good day!

 - Charlie

Hi Ynitial,

That looks good!

What I do to create gaps in paths in the paths-editing mode is hold CTRL for node placement, left-click on the path to create nodes, and then while holding SHIFT you can right-click nodes to remove them and the section of path they're on, whereas right-clicking nodes on a path without holding SHIFT only removes the nodes from the path without breaking the path up.

Removing nodes without breaking the path can be useful for rounding out corners too. Simply hold CTRL and place nodes next to a corner node, one on each side, and then right-click the corner node. The path will automatically interpolate between the two nodes that were created next to the corner node.

The path-layer editing mode can be super handy for doing all kinds of things and I highly recommend becoming familiar with it. The '?' button at the top-right of the PixelCNC window when in the path-editing mode will show you all of the modifier keys for drawing and editing paths.

Hope that helps! Have a good day :]

 - Charlie

Hi hegartype,

Can you post a screenshot so I can understand better what you're referring to? Thanks!

 - Charlie

Hi Ynitial,

Having more control over tab placement is another item that's been on the ever-growing todo list for a while. We're looking at simply adding an offset parameter that allows the user to move where the tabs begin within the distance between two neighboring tabs. This has definitely been something that I'd personally like to see added ASAP as I am always using the profile milling operation and including tabs for cutouts.

The next best thing to manual tab placement would be to use the paths-carving operation. You can use the Trace To Paths function to generate a path with an offset equal to half the diameter of your cutter's flutes. Then manually edit the resulting path to have a gap where you want a tab. Let a profile milling operation do material removal down to where there's enough material left for your desired tab height, and then use the paths carving operation along with the paths-layer from tracing the shape as input to do the final cutout. Just remember that the paths carving operation doesn't allow for any kind of tool offset, being that paths are not considered to have an inside or outside to offset toward or away from the way that 2D milling operations do with their contour input.

Hope that helps! Let me know how it goes, or if you have any other questions or need help with anything else :]

 - Charlie

Hi Joe,

The Confine Cuts option is really just there to specify whether the cutting tool's diameter should be kept within the canvas volume itself, as opposed to if the center of the cutter is allowed to reach the extents of the canvas volume. Personally, I just try to do whatever keeps the canvas XY dimensions as small as possible to eliminate any unnecessary computation when editing and manipulating layers, or generating certain toolpaths. The canvas volume is really just an area you want to generate cutpaths inside of. Some people like to think of it as their workpiece or stock material, but that tends to result in a lot of "unused" space that bogs down computation.

If the Confine Cuts option helps you do something then I say go ahead and use it! :]

 - Charlie

Hi Joe,

Ah, yes, these can be defined. You use a negative radius when specifying a Cylinder tool type :]

Have a good day!

 - Charlie

Hi Joe,

Can you show me a picture or diagram of the cutter geometry you're referring to? I think I understand what you're talking about, but there currently isn't a means of defining such cutter geometry, unfortunately. It's definitely something that can be added in a future update though! I'm adding it to the todo list :]

Cheers!

 - Charlie

Hi Dan,

It looks like all that was left to do was regenerate the operation's toolpath from the Project Operations mode. Whenever changes to the canvas or its contents are made each operation that those changes are relevant to will need to have its toolpath regenerated. Some operations can take a while to generate toolpaths, depending on the complexity of the canvas and cut depth and cut stepover, so the user must manually regenerate toolpaths as needed.

I also took the liberty of increasing the canvas resolution to better capture the fine detail of the text-layer on there.

Cheers! :]

 - Charlie

Hi dkmarquez,

If it was a raster-layer that was created from an SVG then you should only need to change the layer's Z-fill to match the top of the canvas. I am still unsure as to why there is a border contour occurring - if you can't see any kind of seam/edge around the design then it shouldn't be contouring one. If you could send your project file to support@deftware.org or attach it to a reply I will be able to get to the bottom of where that phantom contour is coming from. Generally, loading an image and downsizing it should only create a contour if the image forms an island in the middle of the canvas and there's no Z-fill on the canvas or the layer to fill in the area around it.

Here's a simple example where I've loaded an SVG as a raster-layer and then scaled it down before generating a toolpath. By raising the layer's Z-fill to the top of the canvas we prevent a contour from being generated around the edges of the raster-layer:

It should be fixable with a single change but from the screenshot it's not apparent whether there's a Z-fill around the layer or not.

Cheers! :]

 - Charlie

Hi dkmarquez,

Something is causing a contour to be generated from a rectangular feature around the design. If you created a raster-layer from the SVG then there is likely a border that you can remove by changing the canvas Z-Fill to the top of the canvas volume, and then change the layer's blend mode to Minimum. Or, if you created a paths-layer from the SVG, then you can use the path-editing mode to select and delete any rectangle that's surrounding the design. This will also mean that you'll need to toggle (either from on to off, or off to on, depending on what it's already set at) the operation's contour "Invert" option.

If you can show me a screenshot of PixelCNC in the Project Operations mode with the relevant operation selected so I can see both your canvas and your operation parameters I can better guide you :]

 - Charlie

Hi dkmarquez,

Unfortunately the creator of the videos opted out of supporting PixelCNC and personally removed them from the YouTube channel. If there's anything in particular that you would like to know how to do just let me know and I'll make sure to get you where you want to go! If you see something that's been created on a CNC router or mill and want to know how to do it in PixelCNC I can walk you through it :]

Cheers! :]

 - Charlie

Hi Joe,

The diameter of the selected tool much match the diameter of the hole features being contoured. The Hole Drilling operation just generates a peck-drilling toolpath, with only Z motions, using a proper drill bit. You can use an endmill instead but your results may vary depending on the geometry of the endmill and how well the flutes clear chips, and what parameters you use.

If you want to use a 1/8" endmill to cut 1/4" holes I would probably just use the Profile Milling operation with a non-zero Cut Width specified, so that it works its way outward. Or, a combination of the 2D Trochoidal Milling with an Offset to leave some stock, and then the Profile Milling operation to bring the holes to size.

Hope that helps. Cheers! :]

 - Charlie

Hi Joe,

The Hole Drilling operation will work for peck-drilling holes using a conventional drill bit. The next best thing is the 2D Trochoidal Milling operation, which will generate a spiral cutpath inside of each circular contour at each cutdepth down to the maximum cutting depth.

The 2D Profile Milling operation will require a cut stepover if the Cut Width parameter is non-zero, because a non-zero cut width indicates that there are going to at least be two cutpaths that are Cut Width apart from eachother, and there needs to be a cut stepover to indicate what increment to stepover at to get from the inner-most cutpath to the outer-most cutpath over the specified cut width distance. Hopefully that makes sense.

Cheers! :]

 - Charlie

Hi Joe,

Thanks for taking the time to submit some ideas and feedback, it's much appreciated! We have been looking at what kind of parameters and things we could tie into tool definitions such as speeds/feeds.

Cheers! :]

 - Charlie

Hi Joe,

The tool slot number in a PixelCNC project is the tool index that an automatic tool changer will put in the spindle.

With a custom G-code post-processor you can have exported G-code contain virtually anything you need. If you need any assistance with that go ahead and send an email to us at support@gmail.com and we'll get you squared away :]

 - Charlie

Hi Joe,

The tool slot numbers in a project are what is used as the tool index in exported G-code. The Tool Library is only for storing definitions that can be re-used in a project, by copying one or more definitions from the library to a project. Changing a tool definition in the library does not change that tool definition for all projects that have previously copied that tool definition to themselves - it is just a list of definitions that a project can copy from to its own tool definitions so that users do not have to re-define the same tools for projects.

Two different systems running PixelCNC could have different tool libraries, which is why exported G-code uses the tool slot number in a project rather than the tool definition index from the library. You can organize your tool library to reflect the tools you have setup in your tool changer, for up to ten tools, and then use the Load Library To List button in the Project Tools mode to automatically copy the first ten tool definitions from the library to a project. It is important to remember that this is only copying whatever definitions currently exist to the project, and is not storing references to the tool library's definitions in the project. Otherwise opening the project on a different system with a different tool library would not end up with the same tool definitions for the project.

Hope that helps. Cheers! :]

 - Charlie

Hi SpicyFlanx,

Thanks for posting your question! I believe that the Paths Carving operation might be best, and it should allow you to go as deep as you want, you'll just need to create a new copy of your topographical map and lower it by the depth you want the holes to be at and put that in its own Layer Group. Then you use that layer group for your Paths Carving operation. Your paths for milling the holes should accommodate for the cutter's radius as well (i.e. a circle that's 1mm in diameter cut with a 2mm cutter results in a 3mm hole).

We've been looking at things for a proper Hole MIlling operation to do, and following the canvas would be a great option to have. It would be a great option to have for the Hole Drilling operation as well!

Let me know if you have any further questions or need help figuring anything out :]

 - Charlie

Hi Pluto,

There are no built-in single-line fonts in PixelCNC (aka "Hershey" fonts). However, you can use fonts you have installed in combination with the Medial-Axis Carving operation to get virtually the same effect. For instance here is the font "Aristotelica Small Caps Regular":

Here is the resulting simulated v-carving, using a V-bit cutter and the Medial-Axis Carving operation:

Does that accomplish what you're hoping to do?

Alternatively, I believe Inkscape has Hershey text which you can then export as an SVG/DXF and create a paths-layer from in PixelCNC, which can then be used as input to the Paths Carving operation, which will directly traverse the paths from the Hershey text vector.

Hope that helps. Have a good day! :]

 - Charlie

Hi Pluto,

Yes, but please contact us via support to get the ball rolling on that :]

 - Charlie

Hello! We have moved to deftware.org, which is where Holocraft can be purchased and downloaded.

Hi Joe,

Thanks for your inquiry! A male inlay operation hasn't been finalized yet, there are some issues with parameters we're still trying to figure out, being that the operation effectively combines the profile milling and medial-axis carving operations together into one, resulting in more parameters than any other operation requires. This is looking like it's going to require changes to the project file format (while still allowing older project files to be loaded and converted) along with the operation parameter UI undergoing some changes to accommodate everything - while still being compatible with existing tutorials and videos. We're trying to figure out how to do all of this in a way that doesn't change things too much but other things have our focus and attention at the moment.

The way you're doing it is the way to do it for the moment. We'll be sure to send out an email when new operations are added, so you shouldn't miss a thing.

Cheers! :]

 - Charlie

Hi Russ,

That's awesome! I was wondering when I'd get to see what you managed to do with the things we talked about for the 45 degree corners on there. I like the epoxy, that's an interesting way to do designs and things into there.

We have it on our radar to add support for projects to allow for more operations. We're looking at different options as to how to go about that, as far as the file format's data structures and whether we need to do something about the user interface, particularly for the operations and simulation interface modes.

Thanks for sharing, and have a good week! :]

 - Charlie

Hi hegartype,

That's one way to do it! The other way is to use the Profile Milling operation instead, with a limited Cut Width and a small Stepover, so that you can instead use a 2D Milling operation to clear out most of the larger interior areas. This is demonstrated with the pirate V-carving project on the downloads page deftware.org/pages/downloads  and is the recommended way to go for V-carvings that have a lot of pocket area to clear.

Let me know if you have any other questions or need help with anything else and have a good day! :]

 - Charlie

Hi Jacques,

We currently do not have any provisions for any other input peripherals besides keyboard and mouse in PixelCNC. We will look into what is involved and see what we can do!

Have a good day! :]

 - Charlie

That's what I'm here for! Let me know how she goes :]

Hi Hegartype,

It looks like what you need to employ is the Rest Machining option on your Parallel Carving operation, in combination with the Distance Sort option to ensure that most of the run time isn't taken up by rapiding between unsorted cuts.

If you're already doing this then all you need to do is use different layer groups for your roughing operation and your finishing operation, where the roughing operation clears out a larger area (represented with one layer group) than the finishing operation is toolpathing off of.

Take a look at this project as an example: https://cdn.shopify.com/s/files/1/0308/9658/6890/files/Sea_Ornaments.pnc?v=17497...

Layer Group 1 is used to rough out the shape of the ornaments from the workpiece, with a wider area around them to accommodate the cutter. Layer Group 2 uses a smaller margin around the ornaments for a finishing operation, in combination with the Rest Machining and Distance Sort operations to minimize total cut time by restricting cuts exclusively to the shape of the ornaments themselves. Layer Group 0 is then used by two Profile Milling operations, one to mill out the loop holes for the ornaments and another to cut them out of the workpiece.

The goal is to have a roughing operation clear out an area slightly larger than what the finishing operation will be toolpathing off of, to get the Rest Machining functionality to recognize that cuts do not need to extend into the area that has already been roughed out. This can sometimes require a bit of finesse as far as the Z extent goes. That is to say that it can be beneficial to allow the roughing operation to travel down farther around the desired relief shape than the finishing pass will, so that the cutpaths are properly confined to the Z range of the relief, but every project is different.

Hope that helps. Let me know how it goes! :]

 - Charlie

Hi tumbling_leaves,

This is a situation that can occur for different reasons. If you're using a tapered ballnose for finishing, it won't be able to reach everywhere that a flat endmill or ballnose endmill can reach, due to the taper angle. That could be the situation you're experiencing here, and you should be able to tell by looking at the operations simulated in PixelCNC. The remedy is to include a draft angle, typically that's at least a few degrees larger than the taper of your cutter.

There can also be machine-specific issues that arise, such as the machine flexing while cutting, throwing off where the cutter is from where it's supposed to be, or losing steps while cutting (which is a problem that stepper motor machines have) where the motors can't go where they are trying to because material isn't being removed quickly enough but the controller itself just assumes the steppers are always where it tells them to go - causing your machine's origin to shift. If the simulation looks good then I would wager that you're losing steps by working the machine too hard - or feeding too fast for your spindle RPM and the cutter you're using. The way you can find out if you're losing steps is by moving the machine to a known position after a cut to see if it thinks it is where it should be.

If you're losing steps you can try dialing back your feed rate, or increasing your RPM, or use a 2.5D milling operation for hogging material out first instead of a 3D contouring operation.

Hope that helps. Let me know how she goes and have a good week! :]

 - Charlie

Hi Hegartype,

Ah, I think I understand what's happening. OK so with the Z-Fill raised up, there's not enough room around the model. What you can do is set the canvas' Z-Fill to the top of the canvas (instead of the layer's Z-Fill) and then create a new blank raster-layer, size it to be the "buffer" around the model, and set its blend mode to "Minimum". This raster-layer will need to be below the model-layer in the Canvas Layers list, so that it pushes down the canvas' Z-Fill to make a clearing for the model-layer to sit in.

Let me know if that makes sense, or if you need more explanation and detail :]

 - Charlie